SDR SWAA2020030642205

Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date: February 19, 2020
Submitted: March 6, 2020
Operation: Air carrier
Aircraft: N424WN
Make and model: Boeing 7377H4
Aircraft serial: 29828
Aircraft time: 61,632 hours, 36,258 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Condition: Corroded
Location: Fuselage
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PASSENGER CABIN AFT WET AREA AT STA 986.5 AND RBL 45 TO RBL18 THERE IS A PREVIOUS REPAIR SHOWING SPOTSOF CORROSION AROUND THE FASTENER HOLES. DOT 82-102. REMOVED CORROSION ON FLOOR BEAM STA 986.5 FROM RBL 18" TO RBL 45" AROUND FASTENER HOLES PER SRM 51-10-02-0G-0, FOUND OUT OF LIMITS PER SRM 53-70-51-1A-1, AND INSTALLED UPPER CHORD FLOOR BEAM REPAIR AT STA 986.5 PER REF B737 SRM 53-70-51-2R-4 REP 4 FROM LBL 7.93" TO RBL50"

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